Manchester City is Sanchez's preferred option but United's willingness to meet the financial demands of both the player and his club have made them favourites to complete a deal.
United has been linked with a move for Arsenal forward Alexis Sanchez, with Manchester City also interested in the Chile worldwide.
There have been widespread reports linking Arsenal with a move to sign the 20-year-old Brazilian this month amid the uncertainty about Alexis Sanchez's future at The Emirates.
"He will know which manager he wants to play for and which manager will give him the best chance of developing as a player and winning trophies".
Arsenal are reportedly keen on attracting former Borussia Dortmund playmaker Mkhitaryan to Emirates Stadium as part of any agreement, with the Armenia global having come in for criticism from manager Jose Mourinho this season.
Pep Guardiola held talks on Monday with City hierarchy - Chairman Khaldoon al Mubarak, chief executive Ferran Soriano and director of football Txiki Begiristain - and all agreed to decide to end the pursuit of Sanchez, the sources said. The Gabon worldwide is being monitored by Arsenal as he recently landed himself in trouble for missing a crucial team meeting on Saturday, 13 January.
"Alexis would have played but this is a hard period for him".
"I think him, [Arsenal coach Arsene] Wenger, [CEO Ivan] Gazidis, they are the ones who know what is going to happen". That's why I didn't take a decision (to select him)...
That has not happened, however, as the player has indicated that he is so desperate to leave Arsenal that he would be happy to go to United if City can not or will not reach an agreement. "He did not refuse to play". "That's why I didn't want to travel with him today for him to go somewhere else".